Add some infrastructure (shared between xprtrdma and svcrdma) for
constructing and parsing RPC-over-RDMA error status information.
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
include/linux/sunrpc/rpc_rdma.h | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/include/linux/sunrpc/rpc_rdma.h b/include/linux/sunrpc/rpc_rdma.h
index f33c5a4..a5a36c0 100644
--- a/include/linux/sunrpc/rpc_rdma.h
+++ b/include/linux/sunrpc/rpc_rdma.h
@@ -93,6 +93,12 @@ struct rpcrdma_msg {
__be32 rm_pempty[3]; /* 3 empty chunk lists */
} rm_padded;
+ struct {
+ __be32 rm_err;
+ __be32 rm_vers_low;
+ __be32 rm_vers_hi;
+ } rm_error;
+
__be32 rm_chunks[0]; /* read, write and reply chunks */
} rm_body;
@@ -102,12 +108,16 @@ struct rpcrdma_msg {
* Smallest RPC/RDMA header: rm_xid through rm_type, then rm_nochunks
*/
#define RPCRDMA_HDRLEN_MIN (sizeof(__be32) * 7)
+#define RPCRDMA_HDRLEN_ERR (sizeof(__be32) * 5)
enum rpcrdma_errcode {
ERR_VERS = 1,
ERR_CHUNK = 2
};
+#define err_vers cpu_to_be32(ERR_VERS)
+#define err_chunk cpu_to_be32(ERR_CHUNK)
+
struct rpcrdma_err_vers {
uint32_t rdma_vers_low; /* Version range supported by peer */
uint32_t rdma_vers_high;
@@ -118,7 +128,8 @@ enum rpcrdma_proc {
RDMA_NOMSG = 1, /* An RPC call or reply msg - separate body */
RDMA_MSGP = 2, /* An RPC call or reply msg with padding */
RDMA_DONE = 3, /* Client signals reply completion */
- RDMA_ERROR = 4 /* An RPC RDMA encoding error */
+ RDMA_ERROR = 4, /* An RPC RDMA encoding error */
+ RDMA_LAST
};
#define rdma_msg cpu_to_be32(RDMA_MSG)
--
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